Sewing-machine attachment.



P. JAGOBSON.

SEWING MACHINE ATTACHMENT.

APPLIOATION FILED MAR. 26, 1907.

Patented Aug. 30,1910.

2 sums-sum 1.

ATTORNEY P. JACOBSON.

SEWING MACHINE ATTACHMENT.

' APPLICATION FILED MAR. 26, 1907.

968,852; Patented Aug. 30, 1910.

2 SHEETS-SHEET 2.

WIT N58858:

' INVENTUR za e z1za\ 7 BY ATTORNEY UN IT ED STATES PATE N i T OFFICE.rn'rnn uconsoir, or cnicnao, rumors, assrcnon. TO THE- smenn.MANUFACTUR- me column, A conrom'rron on NEW JERSEY.

SEWING-MACHINE ATTACHMENT.

Specification of Letters Patent.

Patented Aug. 30, 1910.

To all whom it may concern:

Be it known that 1, PETER JAcoBsoN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and use ful Improvements in Sewing-MachineAttachments, of which the following is a specification, reference beinghad therein to the accompanying drawings.

This invention relates to an improvement in thatclass of sewing machineattachments adapted to turn the edges of a strip of material preparatoryto stitching the same for use as a bandor strap for articles ofclothing. In the production of short guiding straps for attachment tothe waistbands of trousers for maintaining the belt in positlon, it iscustomary to utilize small scraps of the material from which the garmentis made, merely clipping the same down to the approximate widthrequired, and introducing the same into the mouth or receiving end ofthe channel-guide for turning and direct ng the same for the stitchingoperation, which is effected by the employment of a twinneedle machine.As in the cutting of such garments it is notrcustomary to'carefullyarrange and classify the scraps of diflerent materials employed, andsuch odd pieces are not subsequently carefully selected and accuratelyout to the desired width, it has frequently happened that thestrip-foldingguldes having rigid tubular delivery orifices as heretoforeemployed have become clogged by reason of variations in thickness of thegoods or in the widths to which the short.-

Strips have been cut.

It is the object of the present invention,

not only to provide means for preventing this clogging of the guidingattachment,

but to render more effective and otherwise improve the construction ofthis class of folding guides; and to this end the invention consists inthe attachment hereinafter described. v

The invention will be understood by reference to the annexed drawings,in which- F i re 1 is a perspective view of the forwar portion of asewing machine provided with the present improvement. Fig. 2 is atransverse section of the folding portion of the attachment, lookintoward the delivery end, and Fig. 3 an end view of the attachment asseen from a point in advance of its delivery end. Fig. 4 is alongitudinal section of the attachment, and Fig. 5 a side elevation ofthe delivery portion of the attachment, with the needle, presser-footand feeddog to show the manner of delivery of the folded fabric to the"stitch-forming mechanism. Fig. 6 is a perspective view representing astrap produced by the use of the at tachment represented in thepreceding figures. Figs. 7 to 10 inclusive disclose a modified form ofbacking-strip folder, Fig. 7 being a plan of such folder with itscarrying plate, Figs. 8 and 9 enlar ed front and rear end views of thefolder etached, and Fig. 10 a longitudinal sectional view of themodified backing-strip folder with the bodystrip folder. 7

The machine is shown provided with the usual bed-plate 1 and thebracket-arm 2 in which are mounted the needle-bar 3 carrymg thetwin-needles 4 and the presser-bar 5 to the lower end of which isattached by means of the fastening-screw 6 the presserfoot comprisingthe shank-portion 7 and foot-portion 8 pivoted thereto by means of thepin 9 and having the forward portion of its lower operative facepreferably channeled in a manner well known for guiding the folded stripof material delivered by the folding member.

The machine bed-plate is provided with the usual, longitudinally slidingcover-plates 11 for access to thearts beneath, and with a longitudinallyad ustable carrier-plate 12 provided with slotted apertures 13 toreceive the fastenin -screws 14 by which it is secured to the be -plate,l and a transverse guide-way in which is fitted the transversely.

adjustable attachment-holding plate 15 provided with slots 16' enteredby fastening disposed lengthwise of the same and entered tubular by thefastening screws 23 by which it is secured to the laterally extendingarms 20 of the plate 18. i

As represented herein, the folding member comprises a spacing block 24secured upon the arched cross-bar 21 by means of screws 25 and providedupon its upper side with a channel-member with rearwardly extendingwork-receiving portions having lateral guiding li s 27 and forwardlyextending rounded fo ding or turning portion 28 whose rounded side wallsare continuous with the guiding lips 27. The turning portion 28, whichis formed with a downwardly ofiset bottom, has extending upwardly fromthe latter a lon 'tudinal stop-rib 29 to receive the edges 0 the stripto be folded. Upon the flat bottom of the receiving portion 26 issecured a work-supporting plate 30 having underturned rearward end toembrace the corresponding end of the plate 26 and having its forward endbeyond theblock 24 spear-shaped and bent into inverted U-form to afforda spring-tongue 31 to support the body tion. This plate is reduced atthe base of the tongue portion, as represented in Fig. 1, to give therequisite flexibility, and is secured to the block adjacent thereto bymeans of fastening screws 32.

Nearthe receiving end of the channelmember 26 is disposed a cross-bar33, to which are attached by mea'ns of fasteningscrews 34, a pair offorwardly extending spring-arms 35 upon 0 posite sides of thechannel-member 26 an connected at their forward ends by means of asegmental cappiece 36 which is flared rearwardly and forms, inconjunction with the forward or delivery end of the turning member 28, atubular delivery orifice of which the upper section is adapted to yieldby reasonof the elasticity of its carrying arms 35. By the employment ofthis upwardly yielding cap 36 and the laterally yielding spring-tongue31, it is evident that the attachment is adapted to accommodate andproperly deliver to the stitching mechanism strips of materialdifl'ering in a comparatively large degree in thickness and in the widthto which they are out.

As indicated in Figs. 4 and 5, the stripguiding member 19 extendssomewhat in advance of the forward end of the turningmember 28. Thelongitudinal shifting of the carrier-plate 12 effects the adjustment ofthe entire attachment crosswise of the line ofseam so as to enable thelines of stitch-' ing along the margins of the folded strip to be evenlyspaced from the edges, while the adjusta ility of the attachment-holdinplatelt'v parallel with the line of seam a ords means of setting theattachment at a distance from the presser-foot which is the of thefabric in the edge-turning operamost advantageous for the operation ofthe device.

It sometimes happens that the feeding mechanism of the sewing machine,herein represented by the feed-dog 37 has a slight inclination to drawthe work to one side or the other, in which case the normal relation ofthe body-strip with the backing-stri of the two guides is likely to bedisturbe In order to compensate for any such action, the turning guideis made adjustable laterally in respect of the backing-strip guide 19,as before described, thus insuring the ultimate evenness in spacing ofthe edges of the superposed strips, as represented in Fig. 6.

In order to show the operation of the attachment, a strap is illustratedin perspective view in Fig. 6 with the forward portion comprising thebody-strip a and backing-strip b stitched together, but with therearward end portion of the body-strip partially flattened out toexhibit its condition as it passes from the receiving portion of thechannel-member into the turning portion where its edges are bentdownwardly around the tongue 31.

In the form of the improvement above described, the backing-strip guidecomprises merely a flattened tube adapted to accommodate a strip withselvage edges, such as a braid, or a wlder strip with inturned edgespreviously folded, in the form represented in Fig. 6. In Figs. 7 to 10inclusive, is shown an alternative form of backing-strip guide 19 ofwell known form, which is of flattened tubular cross-section at thereceiving end, gradually merging toward the delivery end into the shaperepresented in Fig.

marginal portions of the strip 1) of fabric are gradually turnedupwardly and in wardly in its passage to the stitch-forming and feedingmechanisms. This guiding member, like that shown in the precedingfigures, is carried by a plate 18 for securing it upon the holding plate15, and for supporting the block 24 which carries the bodystrip folder.

As will be readily observed, the present improvement differs radicallyfrom folding attachments designed to deliver binding strips withoverlapped edges to the stitchforming mechanism, in that by the presentimprovement the strip is delivered to the stitch-forming mechanism insubstantially closed tubular form with the central portion overlying theinturned edges, the extremities of which normally abut against thestop-rib 29, which is directed intermediate the space between theneedles in order that the latter shall lay the lines of stitchesintermediate" such edges and the extreme marginal portions of the foldedstrips thus presented to the stitch-forming mechanism, as representedaaasmi in-Fig. 6, and as also indicated in'Fig. 1,.

wherein the yielding tongue 31 overlying the stop-rib 29 is directedintermediate the needle holes in the presser-foot through which theneedles pass 1n the stitch-forming operation. I

VVhiIe the present improvement is s'hown and described herein in itspreferred form,

it is evidently susceptible of modification in details of constructionand arrangement of parts toa certain extent without departure from thepresent invention.

Having thus set forth the nature of the invention, what I claim hereinis,:

1. A sewin machine attachment comprising a base-p ate, a spacing-blockmounted upon the same,'a strip-guiding channel-member fixed upon saidblock intermediate its ends and having an open-topped receiving portionextending over and beyond one end of said block and a folding portionwith downwardly offset bottom at the opposite end of said block, theside-walls of the receiving portion being extended to the delivery endand gradually tapered and inwardly inclined in the folding portionthereof, and a work-supporting plate secured to.

said block upon the receiving portion of the channel-member and formedwith a springtongue embraced by saidtapered side-walls of the foldingportion and overhanging the offset bottom of the latter.

' 2. sewing machine attachment comprising a strip-guiding channel-membercontracted and rounded toward its delivery end and provided with asubstantially laterally closed delivery orifice, a central. stop-ribupon the bottom of said channel-member extending longitudinally thereofto its delivery end, and a longitudinally extending and laterallyyielding tongue of taper form and inverted U-shaped cross-sectionenteringthe channel of and embraced by said channel-member and adaptedwhen laterally deflected to straddle said stop-rib.

3. A sewing machine attachment comprising a strip-guiding channel-membercontracted and rounded toward its delivery end, a longitudinallyextending and laterally yielding tongue of taper form and invertedU-shaped cross-section embraced by said channel-member, a centrallongitudinally extending stop-rib upon the bottom of said channel-memberbeneath said yielding tongue at the delivery end of said channel-member,and ayielding segmental cap normally seated upon the upper portion ofthe contracted end of said channel-member to form alaterally closedtubular delivery orifice in conjunction therewith.

4. A sewing machine attachment comprising a strip-guiding channel-membercontracted and rounded toward its delivery end, a longitudinallyextending and laterally yielding tongue of taper form and invertedU-shaped cross-section embraced by said channel-member, a centrallongitudinally extending stop-ribupon the bottom of said channel-member.beneath said yielding tongue at the delivery end of said channelmember,a pair of longitudinally disposed spring-arms rigidly connected with theopposite sides 'Of said channel-member adjacent its receiving end, and asegmental cap connected with and carried by the other ends of saidspring-arms and adapted to form in conjunction with the delivery end ofsaid channel-member a laterally closed tubular orifice having alaterally yielding section.

5. A sewing machine attachment comprising a holding-plate, abacking-strip guide rigidly secured thereon, an overlying strip-guidingchannel-member rigidly connected with said backing-strip guide butlatthereof, said channel-member having a contracted and rounded deliveryend portion, a taper spring-tongue secured Within said channel-memberand embraced by its contracted end portion, and a longitudinal stopribupon the bottom of said channel-member within its contracted deliveryend poftion and disposed beneath said spring-tongue.

7 The combination with a sewing machine comprising stitch-formingmechanism including a pair of spaced reciprocating needles, of acombined backing-strip guide and body-strip fold guide in superposedrelation, a support for the same provided with means of lateral andlongitudinal adj ustmentfor adjusting the same bodily in respect of saidstitch-forming mechanism, and an adjustable connection intermediate saidguiding members for affording relative lateral adjustment of saidmembers.

8. The combination with a sewing machine comprising stitch-formingmechanism including a pair of spaced reciprocating needles, apresser-bar, and a presser-foot carried thereby, of an attachmentsupported independently of said presser-foot and comprlsing astrip-guiding channel-member directed toward the stitch-formingmechanism in the line of feed and contracted toward and divided at itsdelivery end, a longitudinally extending and laterally yielding tongueembraced by said channel member,

and means for yieldingly supporting a section of said channel member atits delivery end whereby the latter is enabled to yield in the directionof reciprocation of said needles.

men.-

In testimony whereof, I have signed my 10 name to this ecification, inthe presence of two subscribing witnesses.

PETER J ACOBSON.

. Witnesses:

Guns. E. ERIE, O'rro 0.,WIECHMANN,

